Canon imageRUNNER ADVANCE 4551i Service Manual page 7

Image Formation System................................................................................................................ 252
Removing the Developing Assembly...................................................................................................252
Removing the Developing Cylinder.....................................................................................................253
Removing the Transfer Roller.............................................................................................................256
Removing the Separation Static Eliminator..........................................................................................257
Removing the Waste Toner Container................................................................................................ 258
Removing the Drum Unit....................................................................................................................259
Removing the Toner Supply Unit........................................................................................................ 259
Fixing System..................................................................................................................................261
Removing the Fixing Assembly.......................................................................................................... 261
Removing the Fixing Main Unit...........................................................................................................261
Removing the Fixing Delivery Upper Guide......................................................................................... 262
Removing the Fixing Film Unit............................................................................................................268
Removing the Pressure Roller............................................................................................................273
Pickup/Feed System....................................................................................................................... 277
Removing the Right Cover................................................................................................................. 277
Removing the Cassette Pickup Unit 1................................................................................................. 278
Removing the Cassette Pickup Unit 2................................................................................................. 280
Removing the Multi-purpose Tray Pickup Roller.................................................................................. 281
Removing the Multi-purpose Tray Separation Pad............................................................................... 283
Removing the Cassette Pickup Roller (1/2)......................................................................................... 284
Removing the Cassette Feed Roller (1/2)............................................................................................285
Removing the Cassette Separation Roller (1/2)................................................................................... 286
Removing the Main Drive Unit............................................................................................................ 286
Removing the Second Delivery Unit....................................................................................................290
Removing the First Delivery Unit........................................................................................................ 291
Removing the First Delivery Drive Assembly....................................................................................... 292
External Auxiliary Control System................................................................................................... 293
Removing the DC Controller PCB.......................................................................................................293
Removing the HVT PCB.................................................................................................................... 293
Removing the Power Supply PCB...................................................................................................... 294
Removing the Air Filter...................................................................................................................... 294
5. Adjustment................................................................................................... 296
Pickup Feed System....................................................................................................................... 297
Image Position Adjustment.................................................................................................................297
Original Exposure System...............................................................................................................298
Service Mode Backup........................................................................................................................298
Actions after Clearing the RAM of the Reader Controller PCB.............................................................. 298
Document Feeder System...............................................................................................................300
Single Pass ADF............................................................................................................................... 300
Reversal ADF................................................................................................................................... 310
Actions at Parts Replacement......................................................................................................... 325
MP Pickup Tray Unit..........................................................................................................................325
DC Controller PCB............................................................................................................................ 325
Hard Disk..........................................................................................................................................325
Laser Scanner Unit............................................................................................................................328
Drum Unit......................................................................................................................................... 328
Developing Unit.................................................................................................................................328
Reader Controller PCB...................................................................................................................... 328
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